Car-door lock.



No. 793,663. I PATENTED JULY 4,1905. 0. O. JOHNSON.

I GAR DOOR LOOK. APPLICATION FILED MAR. 22, 1905.

31 waufoz C. Owfokrteon NITED STATES Patented July 4, 1905.

PATENT FFICF.

CAR-DOOR LOCK.

SPECIFICATION forming part of Letters Patent No. 793,663, dated July 4,1905.

Application filed March 22, 1905- Serial Nr. 251,472.

To all whont it may concern:

Be it known that l, CARL O. JonNsoN, a subject of the King of Sweden andNorway, residing at Lanse, in the county of Clearfield and State ofPennsylvania, have invented certain new and useful Improvements inCar-Door Locks, of which the following is a specification.

This invention comprises a novel form of lock particularly designed forapplication to doors of mine-cars of that type adapted to tilt in orderto discharge the load.

The object of the invention is to provide a lock means for holding thedoor closed and admitting of automatic opening of the door at apredetermined point in its tilting movement to discharge, and the detailstructure of the device will be pointed out more clearly hereinafter.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreffecting the result, reference is to be had to the followingdescription and accom anying drawings.

l/Vhi e the invention may be adapted to different forms and conditionsby changes in the structure and minor details without departing from thespirit or essential features thereof, still the preferred embodiment isshown in the accompanying drawings, in which Figure 1 is a brokenvertical sectional view showing a mine-car having the invention appliedthereto. Fig. 2 is a front elevation of the door-lock alone. Fig. 3 is atop plan view of the door-lock. Fig. 4 is a side elevation showing thepositions of the parts after the car-door has opened, one of the sidelugs removed.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

Referring to the drawings, the invention is shown applied to the body ofa minecar 1 of a common type, said car having a pivot ally-mounted door2 at one end thereof. The door is pivoted at its upper portion and isadapted to open outwar ly 1n discharging the load of a car when the bodyof the latter has been tilted a predetermined distance. The lockmechanism which comprises the invention is secured to the outer side ofthe car-door 2 and comprises, essentially, a suit able supporting-plate3, which is secured to the door by substantial fastenings. Spacedvertical lugs 4 project outwardly from the plate 3, and a pintle-bar 5is mounted in the lugs 4, being arranged horizontally thereof. Mountedupon the pintle-bar 5 is a catch 6, pivoted thereto, said catch beingprovided with a rearwardly-projecting extension. 7. A gravity operatingmember 8 is also pivoted to the pintle-bar 5, said member comprising abar provided at its lower extremity with a weight 9, the upper extremityof the bar having an opening to receive the pintle member 5. Extendingrearwardly from the upper portion of the bar 8 is a loop 10, whichreceives a tail 11 of a hook 12, pivoted to a pin or stud 13, projectingoutwardly from the plate 3 at a point between the lugs 4, abovedescribed. The hook 12 is adapted to engage over the extension 7 of thecatch 6, and this hook when in engagement with said catch has the billthereof received in a recess 14 upon the inner side of one of the lugs4. The hook 12 is adapted for pivotal movement with its axis about ataright angle to the line of axis of the catch 6.

When in operative position, the catch 6 isadapted to engage a connection15, consisting, preferably, of a chain permanently secured at one end tothe bottom of the carbody 1 within the same, as indicated at 16,

said chain passing through an opening 17 in tilted, however, inunloading the same, it will be noted that the gravitymember8 will moveoutwardly, causing the loop to move downwardly and actuating the tail 11in a corre- The movement of the sponding direction.

tail 11 will force the hook 12 out of engagement with the extension 7 ofthe catch, releasing the latter automatically and disengaging the chain15 therefrom. The chain 15, being disengaged from the catch 6, willrelease the door, and the latter will open in a manner which will bereadily apparent.

A loop or like member may be provided at one end of the chain 15 toengage over the catch 6. One of the lugs 4 is provided with a verticalslot 18, in which the end portion of the tail 11 of the hook 12 moves,said slot 18 affording a guide for the hook in its movement.

The lock device above described is very simple in its operation, andafter the car has been unloaded it is only necessary for the operator toagain connect the chain 15 with the catch 6 after the extension 7 of thelatter has been engaged with the hook 12.

Having thus described the invention, what is claimed as new is 1. In alock device of the class described, the combination of a movable catch,a movable hook arranged to hold the catch in a predetermined position,and a gravity operating member for actuating the hook.

2. In a lock device of the class described, the combination of a pivotedcatch, a hook arranged to hold the catch in a predetermined position,and a pivoted gravity operating member for actuating the hook.

3. In a lock device of the class described, the combination of a pivotedcatch, an extension projected therefrom, a hook arranged to engage theextension aforesaid, and a movable gravity operating member engaging thehook for actuating the same.

4. In a lock device of the class described, the combination of a pivotedcatch, an extension projected therefrom, a hook arranged to engage theextension aforesaid, and a movable gravity operating member having aloop for engagement with the hook.

5. In a lock device of the class described,

the combination of a pivoted catch, an extension projected therefrom, apivoted hook adapted to engage the extension aforesaid, a tail for saidhook, and a gravity operating member cooperating with the tail of thehook.

6. In a lock device of the class described, the combination of a pivotedcatch, an extension projected therefrom, a pivoted hook adapted toengage the extension aforesaid, a tail for said hook, and a pivotedgravity operating member provided with a loop receiving the tail of thehook.

7. In a lock device of the class described, the combination of asupport, a catch pivoted thereto, a hook arranged to hold the catch in apredetermined position, a tail extending from the hook, means foractuating the hook, and guide means cooperating with the hook.

8. In a device of the class described, the combination of a movablecar-body, a door for said body, lock means for the door comprising acatch pivoted thereto, a hook arranged to engage the catch, agravityoperating member for actuating the hook, and a coninection between thecatch and the carbo y.

9. In a device of the class described, the combination of a movablecar-body, a door therefor, lock means for the door comprising a catchpivoted thereto, an extension projected from the catch, a pivoted hookengaging said extension, a tail extendingfrom the hook, a pivotedgravity-bar provided with a loop receiving the tail aforesaid, a weightat one end of said bar, and a connection secured at one end to thecar-body and passed through theddoor and connected with the catchaforesai In testimony whereof I affix my signature in presence of twowitnesses.

CARL o. JOHNSON.

